The aim of that functionality is automatic verification of CPU/memory/IO logical setup of all your LPARs/VMs and CPU pools based on historical utilization data.
It is something what points you to potential problems in configuration setup and advises you changes which should increase performance of the HW and logical partitions running there.
Recommendations are based on our best practices
Consider it as an "advisor" only which does its job based on predefined logic which does not have to fit to all situations.
At the end the administrator have to decide what is really wrong and take appropriate action. It shows you all support data for the right decision. It is batch job which runs once a day after the midnight and collects average and peak CPU/memory and IO utilization of all LPARs/VMs and CPU pools.
Then the script does calculations and suggesting resource changes.

Time periods:

• Last day
• Last week
• Last month

Supported technologies:

• IBM Power Systems
• VMware
• Nutanix
• Proxmox

Examples

VMware VM

IBM Power System: LPAR

IBM Power System: POOL

Advisor access from the 'settings' menu